The phrase "a crucial variable in" is correct and usable in written English.
It can be used when discussing an important factor or element within a specific context, such as research, analysis, or a particular field of study.
Example: "In the study of climate change, carbon emissions are a crucial variable in understanding global temperature rise."
Alternatives: "an essential factor in" or "a key element in".
Clearly, weight within the normal range is a crucial variable in inflammatory responses leading to cognitive changes.
They did not dispute that their interpretive skill was a crucial variable in detecting breast cancer, or that, absent a system to track their mistakes, they had no sure way of judging their own work.
A crucial variable in quality control of crude oil separation is the gas liquid ratio (GLR), and adjustments on this variable directly control the quality of oil produced during the separation process.
That makes it a crucial variable in the population register.
Although this is a crucial variable in the neoclassical theory of labor supply, there is still an open discussion on the best way to estimate it.
This raises issues with respect to the factorial validity of reproductive health, which is a crucial variable in this study.
In view of our and others' findings (Levitt, 2001; Pérez-Armendáriz, 2014; Córdova & Hiskey, 2015), we claim that studies that look at the impact of financial remittances without taking into account social learning effects might be disregarding a crucial variable and in fact essentially overestimating the impact of financial remittances.
Since male nightingales are involved in chick rearing, paternal investment might be a crucial variable for female mate choice in this species.
The son or daughter or spouse who nodded off or was briefly inattentive, allowing a loved one to slip out, might feel guilty, and so understate, sometimes by many hours, how long the person has been gone — a crucial variable because time on the run in turn hugely increases the potential size of the search area.
In this context, administration of NO during in vitro NO RBC interactions becomes a crucial variable.
In this context, it has been demonstrated that, for the health workforce in particular, working time is a crucial variable.
